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A reactor for enhancing the stability of granular sludge

A sludge stabilization and particle enhancement technology, which is applied in the field of water pollution control, can solve problems such as uneven screen water distribution, achieve uniform water distribution without dead zones, and solve the phenomenon of granular sludge instability and hydraulic shear speed. Increased effect

Active Publication Date: 2022-03-25
知和环保科技有限公司
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  • Abstract
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Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a method for enhancing the stability of granular sludge, which sets uneven screens so that the water distribution in the reactor is uniform without dead zones; the hydraulic shear rate is increased to inhibit the rapid growth of microorganisms, which can Form denser granular sludge, solve the phenomenon of granular sludge instability under high load conditions, improve effluent water quality, and reduce project costs

Method used

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  • A reactor for enhancing the stability of granular sludge
  • A reactor for enhancing the stability of granular sludge
  • A reactor for enhancing the stability of granular sludge

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Effect test

Embodiment 1

[0024] Using the fluid dynamics (CFD) software Fluent to simulate the flow field distribution in the UASB reactor without the above-mentioned uneven screen member and the UASB reactor of the present invention, establish a three-dimensional solid model with Solidwork, and divide and process the reactor grid with ICEM , the UASB reactor geometric grid and the UASB reactor geometric grid of the present invention that do not contain the above-mentioned uneven screen members are respectively as follows image 3 with Figure 4 shown. The water inlet is a flow rate inlet, the water inlet flow rate is 2m / h, and the outlet is a pressure outlet. The flow field distribution in the UASB reactor without the above-mentioned uneven screen member and the UASB reactor of the present invention is respectively as follows Figure 5 with Image 6 As shown, the distribution of the flow field in the reactor of the present invention is more uniform, there is basically no dead zone, and the hydrauli...

Embodiment 2

[0026] Adopt common UASB reactor and UASB reactor of the present invention to treat nitrate waste water, add flocculent sludge in reactor before water inflow, make sludge concentration reach 8g / L; Next, pump in reactor Into the nitrate wastewater, with methanol as the carbon source, the volume load of nitrate nitrogen is 1Kg / (m 3 •d), the reactor is continuously fed with water.

[0027] After 23 days of operation, no granular sludge was formed in the ordinary UASB reactor, and the sludge concentration increased to 14.4g / L; the flocculent sludge in the reactor of the present invention was converted into granular sludge, and the sludge concentration increased to 22.3g / L.

[0028] When continuing to operate for 42 days, granular sludge is formed in the ordinary UASB reactor, and the sludge concentration rises to 21.5g / L; the granular sludge concentration in the reactor of the present invention remains at 24g / L.

[0029] On the 43rd-46th day, gradually increase the nitrate nitr...

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Abstract

The invention discloses a method for enhancing the stability of granular sludge, and relates to the field of water pollution control. The main feature of the present invention is: install a non-uniform screen perpendicular to the direction of water flow in the granular sludge formation area inside the UASB reactor, use hydraulic selective pressure to accelerate the formation of granular sludge, and increase the density of granular sludge. This uneven screen can make the water distribution more uniform, avoid dead zone, increase hydraulic shearing effect, and form denser granular sludge, thereby avoiding the disintegration and floating of granular sludge caused by the increase of reactor load, and ensuring stable pollution. removal efficiency. When the load further increases, turn on the outlet water return switch, and the inlet peristaltic pump sucks the return water and sewage at the same time. The peristaltic pump and the uneven screen work together to further increase the flow rate and strengthen the stability of granular sludge.

Description

technical field [0001] The invention belongs to the field of water pollution control, and provides a reactor for enhancing the stability of granular sludge and an application method thereof, which is mainly used for nitrogen removal in high-concentration wastewater, solves the problem of unstable granular sludge when the load increases, and avoids granular sludge Sludge flotation and disintegration lead to a decrease in removal efficiency. Background technique [0002] Granular sludge technology is an emerging wastewater biological treatment technology, which has the advantages of good settling performance, large biological retention, and high treatment efficiency. However, granular sludge is more sensitive to environmental changes, especially during high-load operation, granular sludge is prone to breakage and floating, which will reduce the nitrogen removal efficiency. Therefore, some researchers have conducted research on how to improve the stability of granular sludge. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/2846
Inventor 李海松刘明珠田会阳朱建平孟遥李智杰
Owner 知和环保科技有限公司
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